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Multimessenger observations of a flaring blazar coincident with high-energy neutrino IceCube-170922A
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Number of Authors: 9672018 (English)In: Science, ISSN 0036-8075, E-ISSN 1095-9203, Vol. 361, no 146, p. 146+-Article in journal (Refereed) Published
Abstract [en]

Previous detections of individual astrophysical sources of neutrinos are limited to the Sun and the supernova 1987A, whereas the origins of the diffuse flux of high-energy cosmic neutrinos remain unidentified. On 22 September 2017, we detected a high-energy neutrino, IceCube-170922A, with an energy of ~290 tera–electronvolts. Its arrival direction was consistent with the location of a known γ-ray blazar, TXS 0506+056, observed to be in a flaring state. An extensive multiwavelength campaign followed, ranging from radio frequencies to γ-rays. These observations characterize the variability and energetics of the blazar and include the detection of TXS 0506+056 in very-high-energy γ-rays. This observation of a neutrino in spatial coincidence with a γ-ray–emitting blazar during an active phase suggests that blazars may be a source of high-energy neutrinos.

Place, publisher, year, edition, pages
American Association for the Advancement of Science , 2018. Vol. 361, no 146, p. 146+-
National Category
Astronomy, Astrophysics and Cosmology
Research subject
Physics, Astroparticle Physics
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URN: urn:nbn:se:lnu:diva-77442DOI: 10.1126/science.aat1378ISI: 000438449200037PubMedID: 30002226Scopus ID: 2-s2.0-85050281902OAI: oai:DiVA.org:lnu-77442DiVA, id: diva2:1242887
Available from: 2018-08-29 Created: 2018-08-29 Last updated: 2019-08-29Bibliographically approved

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Becherini, Yvonne

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